An embedded ReS2@MAPbBr3 heterostructure with downhill interfacial charge transfer for photocatalytic upgrading of biomass-derived alcohols to aldehydes and H2.

Autor: Shan, Tao, Li, Yanbo, Ke, Sunzai, Su, Bo, Shen, Lijuan, Wang, Sibo, Yang, Xuhui, Yang, Min-Quan
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Zdroj: Journal of Materials Science & Technology; Apr2024, Vol. 179, p155-165, 11p
Abstrakt: • ReS 2 -embedded MAPbBr 3 was constructed for upgrading of biomass-derived alcohols. • A strong built-in electric field with downhill interfacial charge transfer was formed within the heterostructure. • KPFM study revealed a spatial separation of charge carriers between the MAPbBr 3 and the ReS 2. • The reaction mechanism and enhanced photoactivity over the composite were revealed. Solar-driven selective upgrading of lignocellulosic biomass-derived alcohols to value-added chemicals and clean fuel hydrogen (H 2) shows great potential for tackling the energy crisis and environmental pollution issues. Here, we construct a MAPbBr 3 /ReS 2 heterostructure by embedding distorted tetragonal (1T) phase ReS 2 nanoflowers into large-sized MAPbBr 3 for green value-added utilization of biomass-derived alcohols. The embedded structure effectively enlarges the contact interface between the ReS 2 and the MAPbBr 3 , and importantly, induces a strong built-in electric field aligned between the spatially well-defined MAPbBr 3 and ReS 2 nanoflowers. Moreover, the distorted 1T phase ReS 2 with low work function well matches the energy band of MAPbBr 3 , forming a heterostructure with a downward band bending at the interface. These features empower the MAPbBr 3 /ReS 2 photocatalyst with high capability to promote charge separation and expedite the surface redox reaction. Consequently, optimal BAD and H 2 production rates of about 1220 μmol h−1 g−1 are realized over a MAPbBr 3 /ReS 2 2% sample, which are approximately 9 times greater than those of blank MAPbBr 3. This work demonstrates the great potential of constructing an embedded transition metal dichalcogenide@metal halide perovskites heterostructure with downhill interfacial charge transfer for photocatalytic upgrading of biomass-derived alcohols. [Display omitted] [ABSTRACT FROM AUTHOR]
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